Works perfectly out of the box.
A must try for any grown up to teach a youngster something new. This gadget is so amazing. After it starts up you can place it off to the side and it stays going. That shuts up all who think it's steam powered. Put an ice cube on it and it goes faster. All we need are larger ones for electric generators. Show our childern the way of the future. With concentrated sunlight these things go fast.
Having a few other Stirling Engines I was interested in this new design, I have to say it is amazing. It ran for over four hours on top of a small thermos jug filled with water just off a boil. Fantastic and well made
The unit is ready to use after some quick and easy assembly from the box and with a hot cup of tea under it, it began spinning and whirring away for nearly 20 min. I am very pleased.